2 * Copyright (C) Freescale Semiconductor, Inc. 2006, 2007. All rights reserved.
4 * See file CREDITS for list of people who contributed to this
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of
10 * the License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
26 #include <asm/global_data.h>
28 #if defined(CONFIG_OF_LIBFDT)
30 #include <fdt_support.h>
33 DECLARE_GLOBAL_DATA_PTR;
35 /* System RAM mapped to PCI space */
36 #define CONFIG_PCI_SYS_MEM_BUS CONFIG_SYS_SDRAM_BASE
37 #define CONFIG_PCI_SYS_MEM_PHYS CONFIG_SYS_SDRAM_BASE
39 static struct pci_controller pci_hose;
42 /**************************************************************************
49 volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
50 volatile law512x_t *pci_law;
51 volatile pot512x_t *pci_pot;
52 volatile pcictrl512x_t *pci_ctrl;
53 volatile pciconf512x_t *pci_conf;
58 struct pci_controller *hose;
60 /* Set PCI divider for 33MHz */
61 reg32 = immr->clk.scfr[0];
62 reg32 &= ~(SCFR1_PCI_DIV_MASK);
63 reg32 |= SCFR1_PCI_DIV << SCFR1_PCI_DIV_SHIFT;
64 immr->clk.scfr[0] = reg32;
66 pci_law = immr->sysconf.pcilaw;
67 pci_pot = immr->ios.pot;
68 pci_ctrl = &immr->pci_ctrl;
69 pci_conf = &immr->pci_conf;
74 * Release PCI RST Output signal
80 /* We need to wait at least a 1sec based on PCI specs */
81 for (i = 0; i < 1000; i++)
85 * Configure PCI Local Access Windows
87 pci_law[0].bar = CONFIG_SYS_PCI_MEM_PHYS & LAWBAR_BAR;
88 pci_law[0].ar = LAWAR_EN | LAWAR_SIZE_512M;
90 pci_law[1].bar = CONFIG_SYS_PCI_IO_PHYS & LAWBAR_BAR;
91 pci_law[1].ar = LAWAR_EN | LAWAR_SIZE_16M;
94 * Configure PCI Outbound Translation Windows
97 /* PCI mem space - prefetch */
98 pci_pot[0].potar = (CONFIG_SYS_PCI_MEM_BASE >> 12) & POTAR_TA_MASK;
99 pci_pot[0].pobar = (CONFIG_SYS_PCI_MEM_PHYS >> 12) & POBAR_BA_MASK;
100 pci_pot[0].pocmr = POCMR_EN | POCMR_PRE | POCMR_CM_256M;
103 pci_pot[1].potar = (CONFIG_SYS_PCI_IO_BASE >> 12) & POTAR_TA_MASK;
104 pci_pot[1].pobar = (CONFIG_SYS_PCI_IO_PHYS >> 12) & POBAR_BA_MASK;
105 pci_pot[1].pocmr = POCMR_EN | POCMR_IO | POCMR_CM_16M;
107 /* PCI mmio - non-prefetch mem space */
108 pci_pot[2].potar = (CONFIG_SYS_PCI_MMIO_BASE >> 12) & POTAR_TA_MASK;
109 pci_pot[2].pobar = (CONFIG_SYS_PCI_MMIO_PHYS >> 12) & POBAR_BA_MASK;
110 pci_pot[2].pocmr = POCMR_EN | POCMR_CM_256M;
113 * Configure PCI Inbound Translation Windows
116 /* we need RAM mapped to PCI space for the devices to
117 * access main memory */
118 pci_ctrl[0].pitar1 = 0x0;
119 pci_ctrl[0].pibar1 = 0x0;
120 pci_ctrl[0].piebar1 = 0x0;
121 pci_ctrl[0].piwar1 = PIWAR_EN | PIWAR_PF | PIWAR_RTT_SNOOP |
122 PIWAR_WTT_SNOOP | (__ilog2(gd->ram_size) - 1);
124 hose->first_busno = 0;
125 hose->last_busno = 0xff;
127 /* PCI memory prefetch space */
128 pci_set_region(hose->regions + 0,
129 CONFIG_SYS_PCI_MEM_BASE,
130 CONFIG_SYS_PCI_MEM_PHYS,
131 CONFIG_SYS_PCI_MEM_SIZE,
132 PCI_REGION_MEM|PCI_REGION_PREFETCH);
134 /* PCI memory space */
135 pci_set_region(hose->regions + 1,
136 CONFIG_SYS_PCI_MMIO_BASE,
137 CONFIG_SYS_PCI_MMIO_PHYS,
138 CONFIG_SYS_PCI_MMIO_SIZE,
142 pci_set_region(hose->regions + 2,
143 CONFIG_SYS_PCI_IO_BASE,
144 CONFIG_SYS_PCI_IO_PHYS,
145 CONFIG_SYS_PCI_IO_SIZE,
148 /* System memory space */
149 pci_set_region(hose->regions + 3,
150 CONFIG_PCI_SYS_MEM_BUS,
151 CONFIG_PCI_SYS_MEM_PHYS,
153 PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
155 hose->region_count = 4;
157 pci_setup_indirect(hose,
158 (CONFIG_SYS_IMMR + 0x8300),
159 (CONFIG_SYS_IMMR + 0x8304));
161 pci_register_hose(hose);
164 * Write to Command register
167 dev = PCI_BDF(hose->first_busno, 0, 0);
168 pci_hose_read_config_word(hose, dev, PCI_COMMAND, ®16);
169 reg16 |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
170 pci_hose_write_config_word(hose, dev, PCI_COMMAND, reg16);
173 * Clear non-reserved bits in status register.
175 pci_hose_write_config_word(hose, dev, PCI_STATUS, 0xffff);
176 pci_hose_write_config_byte(hose, dev, PCI_LATENCY_TIMER, 0x80);
177 pci_hose_write_config_byte(hose, dev, PCI_CACHE_LINE_SIZE, 0x08);
179 #ifdef CONFIG_PCI_SCAN_SHOW
180 printf("PCI: Bus Dev VenId DevId Class Int\n");
185 hose->last_busno = pci_hose_scan(hose);
188 #if defined(CONFIG_OF_LIBFDT)
189 void ft_pci_setup(void *blob, bd_t *bd)
195 nodeoffset = fdt_path_offset(blob, "/aliases");
196 if (nodeoffset >= 0) {
197 path = fdt_getprop(blob, nodeoffset, "pci", NULL);
199 tmp[0] = cpu_to_be32(pci_hose.first_busno);
200 tmp[1] = cpu_to_be32(pci_hose.last_busno);
201 do_fixup_by_path(blob, path, "bus-range",
202 &tmp, sizeof(tmp), 1);
204 tmp[0] = cpu_to_be32(gd->pci_clk);
205 do_fixup_by_path(blob, path, "clock-frequency",
206 &tmp, sizeof(tmp[0]), 1);
210 #endif /* CONFIG_OF_LIBFDT */